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SELECT 
  cscart_ult_product_descriptions.product_id, 
  cscart_ult_product_descriptions.short_description, 
  IF(
    cscart_ult_product_descriptions.short_description = "", 
    cscart_ult_product_descriptions.full_description, 
    ""
  ) AS full_description, 
  cscart_ult_product_descriptions.meta_keywords, 
  cscart_ult_product_descriptions.meta_description, 
  cscart_ult_product_descriptions.search_words, 
  cscart_ult_product_descriptions.promo_text 
FROM 
  cscart_ult_product_descriptions 
WHERE 
  cscart_ult_product_descriptions.product_id IN (
    21351, 21291, 22158, 21296, 21307, 21352, 
    21287, 22159, 21297, 21342, 21353, 
    21288, 22175, 21298, 21343, 21354, 
    21289, 22177, 21299, 22152, 21344, 
    21355, 22151, 22160, 21300, 21345, 
    20221, 21356, 21488, 22161, 21301, 
    21346, 20222, 21357, 22153, 21552, 
    21302, 21347, 20223, 22154, 21292, 
    21553, 21303, 21348, 21514, 22155, 
    21293, 21304, 21349, 21286, 22156, 
    21294, 21305, 21350, 21290, 22157, 
    21295, 21306
  ) 
  AND cscart_ult_product_descriptions.company_id = 1 
  AND cscart_ult_product_descriptions.lang_code = 'uk'

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}